Nicely done, Lasse. I very much liked your energetic and clear delivery, your choice of the three specific technologies, and the "innovation instead of agitation" catchline.
Since you requested it, some constructive criticism follows:
"all land is taken by existing countries"
A pet peeve of mine is conflating countries and nation-states; it makes for muddled thinking. The rephrasing "all land is claimed by existing states" would be closer to reality.
"people are already living weeks on end on cruise ships"
People living months on end on oil rigs might have been a more-to-the-point example.
In general, the seasteading segment felt the least persuasive of the three, because it conveyed more of a "goody, more real estate" message and glossed over seasteading's political implications, such as importantly the much lowered barrier to exit from undesirable political arrangements by physically reconfiguring seasteads.
Also, an explicit mention of Blueseed as a pending bug fix for badly broken U.S. immigration policies would have been the most concrete example of how seasteading is going to change the world in the next five years.
Of course, I realize you were under time constraints and the choice of what to include and exclude can't have been straightforward. Overall a great job putting Bitcoin and the other ideas in front of a big audience.
If I may ask, what is the process and arrangements for speaking at a TEDx as you did? Were you invited to speak, or did you seek it out yourself?
3rd graders know this.
